Amphoteric polymers copolymers

Among the amphoteric polymers, there is a copolymer type in which cationic and anionic groups coexist in the same polymer chain, and a polymer blend type in which a cationic polymer and an anionic polymer are blended. 

Copolymers can be used to introduce a mixture of chemical functionalities into a polymer. Acidic and basic substituents can be introduced, for example, through comonomers like acrylic acid and vinyl pyridine. The resulting copolymers show interesting amphoteric behavior, reversing their charge in solution with changes of pH. 

Amphiphile-oil-water system, temperature of, 16 424-426 Amphiphiles, 16 420 Amphiphile strength, 6 424 Amphiphilic chemicals, 17 56 Amphiphilic copolymers, 20 482 behavior of, 20 483 well-defined, 20 485-490 Amphiphilic molecules, 15 99-101 Amphiphilic plasticizers, 14 480 Amphiphilic polymer blend, 23 720 Amphiphilic polymers statistical, 20 484-490 stimuli-responsive, 20 482-483 Ampholytes, 9 746-747 Amphoteric cyclocopolymers, water-soluble, 23 721 Amphoteric starches, 4 722 Amphoteric (zwitterionic) surfactants, 24 148... 

Quaternized polymers have been found to improve wet combing and reduce static charge. In general, they can be formulated with anionic surfactants greater deposition occurs with a mixture of amphoteric and nonionic surfactants. Two of the most important examples are Polyquaternium-10, a quaternized hydroxyethylcel-lulose polymer, and Polyquaternium-7, a copolymer of diallyldimethylammonium chloride and acrylamide. These are the two most frequently used polymeric conditioning agents in commercial shampoos [46,47],... 

For type (1), styrene, 2-methyl-5-vinylpyridine and divinylbenzene are copolymerized in the presence of the inert polymer and the obtained membrane is sulfonated and then quartemized 100 amphoteric polyelectrolytes such as a copolymer of jV-diethylamino methacrylate and methacrylic acid are dissolved in a... 

The resins of mousses are generally cationic (e.g., polyquaternium-4 or polyquaternium-11), cationic and neutral, cationic and anionic, or amphoteric. Polyquaternium-4 is a copolymer of hydroxyethyl cellulose and dial-lyldimethylammonium chlordie. This polymer is related to the quaternized hydroxyethyl cellulose polymer depicted in Table 7-2, except the cationic groups are formed from the diaUyldimethylammonium chloride moiety attached to the cellulosic backbone. 

PPG-24-buteth-27 surfactant, agric. pesticides CIO-12 pareth-6 CIO-12 pareth-8 surfactant, alcohol-functional polymers Octadecene/MA copolymer surfactant, alkaline cleaners Disodlum capryloamphodiacetate Octyl propionate Sodium capryloamphoacetate Sodium carboxyethyl tallowpolypropylamine surfactant, alkaline cleaning Octyl betaine surfactant, amphoteric Methyl acrylate surfactant, animal feed Lecithin... 

Separation and purification of microquantities of scandium (III) from macroquantities of rare earths on selective ion-exchangers has been described by Hubicki (1990). The chelating and ion-exchangers examined include phosphonic gel and macroporous, aminophos-phonic, various carboxylic, amino-acids with different matrix compositions, polyphenol, amphoteric (snake in cage polymers), cellulose phosphate, zirconium phosphate, and copolymer of polystyrene with divinylbenzene. The phosphonic, aminophosphonic and cellulose-phosphate were the most effective. 

Antistatic Agents Polar hydrophilic polymers applied as finishes or added to the polymer melt prior to fiber formation improve the static buildup characteristics of polyamides. Polyethylene glycols and acid-containing vinyl and acryl ic copolymers have been used, as have insoluble salts of amphoteric and cationic detergents. 

Siano and coworkers [14] report the use of 8-anilino-l-naphthalenesulfonic acid (ANS) as a probe of environment polarity in polyacrylamides containing 1 mole percent n-dodecylacrylamide (estimated from feed ratio) in 2 wt% NaCl. ANS, an amphoteric probe is selectively solubilized at the water-hydrophobe interface. The fluorescence emission maximum is shifted from 520 nm, in aqueous environments to approximately 462 nm in hydrophobic environments [18]. Studies of the polymer described above and a homopolymer of acrylamide were accomplished by varying polymer concentration up to 5000 ppm at constant ANS concentration. In Fig. 2.10 a, a plot of the emission wavelength maximum of ANS vs polymer concentration indicated an increasingly hydro-phobic environment with increasing copolymer concentration. Above approximately 1000 ppm, emission wavelength remained constant, indicating that ANS... 

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